Light switch



FIG. 1 is a perspective view of a light switch showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines are environmental and form no part of the claimed design. 

The ornamental design for a light switch, as shown and described. 